ON SCOTTISH DESMIDIE.-K 173 



marshes between Loch Kinord and Cambus-o'-Mayj Kin- 

 cardine Muiryhaugh and Dalbrake in Strachan ; Argyle 

 in Glen Coe ; Arran in North Glen Sannox. 



4. M. crenata, Breb. Pretty common. Ross, Inverness, Aberdeen, 



Kincardine, Forfar, Perth, Argyle, Arran, Fife. 



5. M, Crux-Melitensis (Ehr.), Ralfs. Rare. Aberdeen Scotston 



Moor, Brimmond, Den of Gowner near Old Meldrum, 

 Slewdrum, beside Birsemore Loch, Tomachar and Home- 

 head in Cromar ; Kincardine somewhere near Cammie in 

 Strachan:- Forfar Clova Tableland; Perth Durdie, near 

 Perth. 



6. M. denticulata, Breb. General. 



ft notata, Nordst. Not uncommon. 



y angusto-sinuata, Gay. Rare, or overlooked. Kirkcud- 

 bright (Mr. W. West). 



7. M. fimbriata, Ralfs. Rare. Aberdeen Scotston Moor, near 



Kintore, Presswhin, Loch Ullachie, near Ballater ; Kincar- 

 dine near Bridge of Feugh ; Forfar Tannadice Curling 

 Pond, marsh north-west from Menmuir Church. 



(3 spinosa, Bisset, n. var. Very rare. 



Differs from the typical form in having a row of minute 

 spines along each side of the principal sinuses, three or four 

 close to the base of each semi-cell, and a row of about four 

 under the base of the end lobe. Length, 210 /z ; breadth, 

 200 fj.; isthmus, 25^ (Plate IV. fig. 3). Aberdeen Slew- 

 drum, Loch Ullachie and marsh west of it. 



8. M.Jenneri, Ralfs. Not uncommon. Sutherland, Ross, Inver- 



ness, Aberdeen, Kincardine, Forfar, Perth, Argyle, Arran. 



9. M. mucronata (Dixon), Rab. Not common. Ross, Inverness, 



Aberdeen, Kincardine, Forfar, Perth, Argyle, Arran. 



10. M. oscitans, Ralfs. 



This species was reported from Aberdeen by the late Mr. 

 Peter Grant ; but we have seen nothing in this country 

 agreeing exactly with Ralfs's drawings of it. From two 

 localities viz. the head of Glen Tannar, Aberdeen, and 

 Balquhadly Hill, in Fern, Forfar, examples were seen which 

 came near it, but they differed, essentially as I think, in the 

 toothing of the lobes. 



n. M. papillifera, Breb. General. Has been found with zygo- 

 spores in Aberdeen near Dinnet ; and in Perth near Fowlis 

 Wester. 



12. M. pinnatifida (Kg.), Ralfs. General, but scarce. Forms simi- 

 lar to those noted by Wallich and Elfving have been observed, 

 particularly in a pool a little to the north of Loch Dawan. 



